Engineered air EngA G-TRAC2, Инструкция по установке, эксплуатации и обслуживанию

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A
G-TRAC2
IOM-25 7 of 42 Mar 99 R7
value can be read at the terminals provided (See Section XVIII) . The G-TRAC2 will modulate/cycle the burner as needed to
maintain discharge air temperatures.
Basic Features
1. Standard service and testing features such as status indicating LED’s, service pot, and temperature test points.
2.
Proportional and Integral (PI) discharge air temperature control.
3.
Built in discharge set point with a 55 to 100ºF setting range (or optional remote set point) .
4.
Supports one of the optional resets (discharge set point reset) from the following list:

Room Sensing (resistive)

Ambient Sensing (resistive)

0-10 Vdc

4-20 mA
5. Built in auto bypass low limit (can be switched off, Section X) .
6.
Alarm output contacts (AL) . The contacts provide low limit and flame failure annunciation. (Note the Low Limit bypass
can be switched off, Section X.)
7.
Has input terminals for the fan switch, heat switch, and time clock contact, usually remote controlled by a remote
panel, DDC controls etc. Other input terminals are internally controlled.
(E.g. AS, 3, Feedback pots).
8.
Intermittent night blower (and optional damper) operation. Unit discharges at an adjustable elevated discharge
temperature whenever the room calls. GTRAC-2 has no night setback set point; therefore, a second night stat is
required for a lower set point.
9.
Compatible with 0-10 VDC direct control signal . Optical isolation on the digital and BMS inputs (+ and -) .
V. WIRING
Power supply = 24 VAC @ 0.9 amps.
The G-TRAC2 terminals T1 and T2 require a separate 24 VAC, 20 VA class 2 ungrounded isolation transformer supplying
power to only T1 and T2.
Terminal N should be wired to the neutral which is common to the same grounded power source supplying power to
terminals
HS, FS, K, and AS . All remote wiring less than 50 feet long installed in clean electrical environments and attached
to terminals “M, P, Q, U, X, Y, V, Z” and “OR” should be a minimum of 22 ga twisted pair wire. For longer runs and
electrically noisy installations, the use of a minimum 20 gauge-shielded wire is recommended.
(Shield to be grounded at
GTRAC-2 end only.)
The main digital outputs
(damper, supply blower, combustion blower, flame relay, pilot valve, and lockout alarm) are rated
at 4 amps. Digital outputs CA, CG, OA and OG are rated at 1 amp at 24 VAC.